Syphon Filter: The Omega Strain cheats and cheat codes for Playstation 2

Commendations: 
Ehud Ben Zohar: Finish Yemen 1 and 2 missions.
Gabe Logan: Finish Montenegro and Ukraine missions.
Gary Stoneman: Finish Italy, Belarus1, and Belarus 2 missions.
Gray Imani: Finish Carthage 1, 2, and 3 missions.
Lawrence Mujari: Finish Chechnya and Lorelei missions.
Lian Xing: Finish Kyrgystan, Tokyo, and Myanmar missions.
Maggie Powers: Finish Minsk mission.
Teresa Lipan: Finish Zurich mission. 

Ratings:
Reach the indicated ratings to get the bonus items. 

Combat Specialist 
Intermediate (reach 300 kills): G33E 
Advanced (reach 600 kills): FA-MAS 
Expert (reach 900 kills): FAL 
Elite (reach 1300 kills): C8 rifle 

Combat Knife Specialist 
Intermediate (reach 50 kills): Stiletto 
Advanced (reach 100 kills): Shuriken 
Expert (reach 250 kills): IPCA Commando 
Elite (reach 450 kills): VibroBlade 

Combat Sharp Shooter 
Intermediate (reach 200 headshots): Dragunov 
Advanced (reach 450 headshots): AU300 Mod-R 
Expert (reach 750 headshots): ACR 
Elite (reach 1100 headshots): M82 BFG 

Non-Lethal Force Specialist 
Intermediate (reach 50 kills): E.D.T. 
Advanced (reach 100 kills): DormaGen Gas Grenades 
Expert (reach 200 kills): Air Pistol 
Elite (reach 300 kills): E.P.D.D. 

Tactical Explosives Specialist 
Intermediate (reach 100 grenade kills): M61 Frag Grenade 
Advanced (reach 200 grenade kills): Incendiary Grenade 
Expert (reach 350 grenade kills): Sarin nerve agent 
Elite (reach 500 grenade kills): M79 

Team Efficiency Specialist 
Intermediate (2 multiplayer par times): M1 Super 90 
Advanced (4 multiplayer par times): Shot Defender 
Expert (6 multiplayer par times): MDSA3 
Elite (9 multiplayer par times): M-16k 


Ranks:
Reach the indicated rank to get a bonus weapon:

Field Agent: none 
Investigative Agent: Get G-17 
Intelligence Agent: Get Combat shotgun 
Field Officer: Get AU300 Mod-SMG 
Investigative Officer: Get M16 A1 
Intelligence Officer: Get M1911 A1 
Field Research Specialist: Get Jerico-41 
Investigative Research Specialist: Get MAK-10 10mm 
Intelligence Research Specialist: Get MDS-7 
Field Analyst Specialist: Get Slug Defender 
Investigative Analyst Specialist: Get SSG 550 
Intelligence Analyst Specialist: Get SP-57 
Field Supervisor: Get Mark 23 
Investigative Supervisor: Get M4 carbine 
Intelligence Supervisor: Get M16 A2 
Field Operations Commander: Get ShotHammer 
Investigative Operations Commander: Get M4 
Intelligence Operation Commander: Get Stavva M70 B1 
Assistant Chief of Operations: Get SlugHammer 
Deputy Chief of Operations: Get AU300 H-BAR 
Chief of Operations: Get GAWS 12 ga. 
Commander in Chief: Get Mark 23 SD